# Emergence of PT-symmetry breaking in open quantum systems

@article{Huber2020EmergenceOP, title={Emergence of PT-symmetry breaking in open quantum systems}, author={Julian Huber and P. Kirton and S. Rotter and P. Rabl}, journal={arXiv: Quantum Physics}, year={2020} }

The effect of PT-symmetry breaking in coupled systems with balanced gain and loss has recently attracted considerable attention and has been demonstrated in various photonic, electrical and mechanical systems in the classical regime. Here we generalize the definition of PT symmetry to finite-dimensional open quantum systems, which are described by a Markovian master equation. Specifically, we show that the invariance of this master equation under a certain symmetry transformation implies the… Expand

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